Getting Image from URL and append it to array - ios

Question

I am trying to get images from a URL and append them to an array. This if my function for it:
func doStuff(html: String?){
do {
let doc: Document = try SwiftSoup.parse(html ?? "")
let priceClasses: Elements? = try doc.select("[class~=(?i)price]")
for priceClass: Element in priceClasses!.array() {
let priceText : String = try priceClass.text()
print(try priceClass.className())
print("pricetext: \(priceText)")
}
let srcs: Elements = try doc.select("img[src]")
let srcsStringArray: [String?] = srcs.array().map { try? $0.attr("src").description }
for imageName in srcsStringArray {
if (imageName?.matches("^https?://(?:[a-z0-9\\-]+\\.)+[a-z]{2,6}(?:/[^/#?]+)+\\.(?:jpg|gif|png)$"))! {
print(imageName!)
let imageView = UIImageView()
imageView.downloaded(from: imageName!) {
if let image = imageView.image {
self.imagesArray!.append(image)
} else {
print("Image '\(String(describing: imageName))' does not exist!")
}
}
}
}
} catch Exception.Error( _, let message) {
print(message)
} catch {
print("error")
}
}
This code is not working as it always exits and print <imageName> does not exist! . The weird thing is that the fileName is a correct name!
For example:
https://www.adidas.de/on/demandware.static/-/Sites-adidas-DE-Library/default/dw817801e3/Originals_Brand_Nav_Title.png
This is how I download the image from the URL:
extension UIImageView {
func downloaded(from url: URL, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
contentMode = mode
URLSession.shared.dataTask(with: url) { data, response, error in
guard
let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
let data = data, error == nil,
let image = UIImage(data: data)
else { return }
DispatchQueue.main.async() {
self.image = image
}
}.resume()
}
func downloaded(from link: String, contentMode mode: UIView.ContentMode = .scaleAspectFit, finished: () -> Void) {
guard let url = URL(string: link) else { return }
downloaded(from: url, contentMode: mode)
finished()
}
}
Does anyone have any idea why I can not append images to my array ??? Im stuck..

Answer 1

I fixed the issue by changing the way I load the image:
extension UIImage {
public static func loadFrom(url: URL, completion: #escaping (_ image: UIImage?) -> ()) {
DispatchQueue.global().async {
if let data = try? Data(contentsOf: url) {
DispatchQueue.main.async {
completion(UIImage(data: data))
}
} else {
DispatchQueue.main.async {
completion(nil)
}
}
}
}
}
With this I simply call:
for imageName in srcsStringArray {
if (imageName?.matches("^https?://(?:[a-z0-9\\-]+\\.)+[a-z]{2,6}(?:/[^/#?]+)+\\.(?:jpg|gif|png)$"))! {
guard let url = URL(string: imageName!) else { return }
UIImage.loadFrom(url: url) { image in
if let image = image {
print("append")
self.imagesArray.append(image)
} else {
print("Image '\(String(describing: imageName))' does not exist!")
}
}
}
}